Keystones — Lintel
Five GCSE retrieval questions · 19 August 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 540,000 in standard form
Answer: 5.4 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + 5x - 50
Answer: (x + 10)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 26cm, angle = 32°. Find adjacent side. Give your answer to 2 decimal places
Answer: 22.05cm -
4. Ratio Mixed ratio problems
Simplify: 9:18:18
Answer: 1:2:2 -
5. Statistics Mean
The mean of 5 numbers is 37. If 4 of them are 31, 33, 49, 50, what is the missing number?
Answer: 22